Tool for removing bearing races, bushings, and the like



J. w. Hcwr-:LL E

M TTORNEY:

Toor. FOR EEMvING BEARING RACES, BusHINGs', AND THE LIKE Oct. 2l, 1930.

'. Patented Oct. 21, 1930- 9man UNITED STATES PATENT OFFICE JAMES W.HOWLL, F CLEVELAND, OHIO, ASSIGNOR T0 THE WHITE MOTOR COMPANY,

OF CLEVELAND, OHIO, A. CORPORATION OF OHIO TOOL FOR REMOVING BEARINGRACES, BUSHINGS, AND TH LIKE Application filled January 30, 1928. SerialNo. 250,409.

This invention relates to an improvement in tools of the type employedin removing bushings, rings, races or similar articles from a retainingstruct-ure. l

Articles such as bearing races, bushings or the like are frequentlymounted internally of a retaining means or support such as a shell andare positioned' in the retaining means' under great pressure. Devicescustomarily used for removing the annular article have been relativelycomplicated and inefficient and their use has frequently resulted inbreaking, cracking or otherwise weakening the retainer or the annulararticle.

It is an object of this invention to provide a tool for removingarticles from a retainer structure,`whereby the disadvantages heretoforeencountered are eliminated. A, further object of this invention .is toprovide a tool which shall be capable of exerting a maximum of forceupon the annular ring with a minimum of effort by the operator.

- Other objects will be apparent from the accompanying specification andfrom the draw,- ings in which latterl; l Y

Figure 1 is aside elevation of the tool shown in position to begin thepullingoper- Figure 2 islan end elevation of the tool; Figure 3 is atransverse 'section rthrough the tool upon the line 3-3 of ligure 2showing the article partly removed from its support-- ing structure;

Figure 4 is a section upon" the line 44 of Figure l;

Figure 5 is a section of a detail'of the tool showing the 'articleengaging arms operating upon a ring of reduceddiameter.

,Figures 6 and 7 are detail perspective views of the article engagingarms.

1 Referring particularly to the draw-ings the tool is shown as appliedfor the removal of an annular article 1 from the hub structure orsupport2 with which it has tight engagement. Tn its preferred embodimentthe tool comprises an abutment 3, a portion of which is adapted-to bearagainst the outer end ofI the hub structure 2. A wedge member is iprovided which is adapted to cooperate with the abutment, said wedgemember comprising a conical head 4 and a screw threaded shank 5. Thescrew threaded shank passes loosely through the top of the abutment'memben Longitudinal movement of the wedge With respect to the abutmentmember is effected by means of the handle 6 which has screw'threadedengagement withthe shank 5 upon the `opposite side of the abutment fromthe head 4. Thrust bearings 7 are provided between the abutment andhandles and the handle is' turned during the pulling operation.

The shank of the wedge carries vloosely a framel 8 upon which thearticle engagingarms or members 9 are pivotally supported at 10. In thespecific embodiment illustrated there are four of the arms 9 which armsare of identical construction. The outer face of each arm 9 isprovided-at the end thereof with a laterally projecting shoulder 11which is adapted to engage behind the rear of the ring to be removed.The inner face of each arm 9 is provided at the end thereof with ta-.pered or cam surface 12 which is adapted to be engaged by the head 40fthe wedge. Enf gagementof the head 4 Withthe cam surfaces serves to movethe arms 9 laterally pro-A 4jecting'the shoulders 11 into alignment withthe article. The face 13 of each arm 9 extends uninterruptedlylongitudinally at a reduced angle' to the longitudinal extent of the armfrom the cam surface l2 to shoulder 14 which projects laterally from thearm Iand functionsA as an abutment limiting longitudinal movement ofthe' head 4 of the wedge. A.

knurled locknut 15T/is provided which has screw threadengagement withthe shank 5. This nut is adapted to be screwed tightly against theframe8 when the head 4 has been drawn into abutting engagement withthecam surfaces 12, 13 or 14. A function of the locknut 15 is to preventrelative'rotation be tween the Wedge member and thel arms 9 andtherebyovercome any rotative strains `which may be'plac'ed upon the wedgemember dur- -ingrotation ofthe handle 6.

In utilizing the tool for removing an article of the relative size shownin Figures 1 and 3 the wedge vmember is advanced beyond the outer endsof the arms in order to facilitate the admission ofthe shoulderedportions 11 within the annular article to be operated upon. The tool isthen positioned with the abutment resting upon the outer end of the hub`structure and the arms extending into and protruding beyond the annulararticle. The handle 6 is then rotated, thereby drawing the head 4 intoengagement with the arms and forcing them laterally so that the shoulder11 projects behind the article. Further longitudinal movement of thewedge .member draws the head 4 against the shoulders 14 and subsquentlywithdraws the arms 9 and the ring lfrom the hub member 2. Vhen the toolis utilized for removing an article of the relative internal diametershown in Figure 5, engagement of the head of the wedge with the camsurfaces 12 of the Iarms both spreads the arms and effects longitudinalmovement of the arms. It will be obvious that surfaces 13 will cooperatewith the wedge to produce a similar result when articles of other sizesare operated upon. While a specific form of device `has been shown anddescribed it is obvious that various modifications may be-made thereinand it is not intended to y limit the invention .otherwise than isindicated by the scope of the appended claims.

I claim: 1. A device for removing an annular article from a supportcomprising members engage- 2. A device for removing an annular articlefrom a support comprising members engageable with the annular article,said members being shouldered intermediate their ends, an abutmentadapted to bear against the support, wedge means, the face oftheshoulders being spect to the abutment whereby the wedge spreads themembers into'engagement with the annular article, and anti-frictionbearin means interposed between the abutment and the adjustably threadedmeans.

4.- A devicefor removing an annular article from a support comprisingmembers engage ablewith the annular article, an abutment adapted to bearagainst the support, wedge means having a screw threaded portionextending throu l1 the abutment, means adjustably threaded upon thescrew threaded portion of the wedge for drawing the latterlongitudinally with respect to the abutment whereby the wedge spreadsthev members into engagement with the annulan article, and a lock nutfor locking the wedgemeans nonrotatably with respect to themembers.

In testimony whereof I hereunto aiiiX my signature this 25th day ofJanuary, 1928.

JAMES W. HOWELL.

inclined toward the wedge means in the ydirec- Y tion of the pull' meansfor causing relative movement between the `wedge means and abutmentwhereby the wedge engages the shoulders to cause longitudinal movement.of

. the members and outward pressure thereon.

3. A device for removing an annular articlel from a support comprisingmembers engageable with the annular article, vsaid members beingshouldered intermediate their ends, an abutment adapted to bear againstthe support, wedge-shaped means having a screw threaded portionextending through the abutment, means adjustably threaded upon the-screw-threaded portion of the wedge for drawing the latterlongitudinally with re-

